Step 1: Make the Cake Base
Preheat oven to 350°F (175°C).
In a bowl, combine almond flour, cocoa powder, erythritol, and baking soda.
Add eggs, melted butter, and vanilla. Mix until smooth.
Pour into greased springform pan. Bake 15–18 minutes.
Cool completely before adding mousse layers.
Step 2: Dark Chocolate Mousse
Melt unsweetened chocolate in a double boiler.
Stir in bloomed gelatin.
Whip cream with powdered erythritol until soft peaks form.
Gently fold chocolate mixture into whipped cream.
Spread over cooled cake base. Refrigerate 30 minutes.
Step 3: Milk Chocolate Mousse
Melt keto milk chocolate and let cool slightly.
Mix with mascarpone and vanilla.
Whip cream until stiff peaks form; fold into chocolate mix.
Layer onto dark chocolate mousse. Chill 30 minutes.
Step 4: White Chocolate Mousse
Melt white chocolate and let cool slightly.
Beat cream cheese and sweetener until smooth.
Whip cream, fold into cheese mixture, then fold in white chocolate.
Spread as final layer. Chill at least 2–3 hours (or overnight).